376 lines
13 KiB
C
376 lines
13 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* Development of the code in this file was sponsored by Microbric Pty Ltd
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2016 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <string.h>
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#include "driver/gpio.h"
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#include "py/runtime.h"
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#include "py/mphal.h"
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#include "modmachine.h"
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#include "extmod/virtpin.h"
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typedef struct _machine_pin_obj_t {
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mp_obj_base_t base;
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gpio_num_t id;
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} machine_pin_obj_t;
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typedef struct _machine_pin_irq_obj_t {
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mp_obj_base_t base;
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gpio_num_t id;
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} machine_pin_irq_obj_t;
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STATIC const machine_pin_obj_t machine_pin_obj[] = {
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{{&machine_pin_type}, GPIO_NUM_0},
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{{&machine_pin_type}, GPIO_NUM_1},
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{{&machine_pin_type}, GPIO_NUM_2},
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{{&machine_pin_type}, GPIO_NUM_3},
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{{&machine_pin_type}, GPIO_NUM_4},
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{{&machine_pin_type}, GPIO_NUM_5},
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{{&machine_pin_type}, GPIO_NUM_6},
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{{&machine_pin_type}, GPIO_NUM_7},
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{{&machine_pin_type}, GPIO_NUM_8},
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{{&machine_pin_type}, GPIO_NUM_9},
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{{&machine_pin_type}, GPIO_NUM_10},
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{{&machine_pin_type}, GPIO_NUM_11},
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{{&machine_pin_type}, GPIO_NUM_12},
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{{&machine_pin_type}, GPIO_NUM_13},
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{{&machine_pin_type}, GPIO_NUM_14},
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{{&machine_pin_type}, GPIO_NUM_15},
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{{&machine_pin_type}, GPIO_NUM_16},
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{{&machine_pin_type}, GPIO_NUM_17},
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{{&machine_pin_type}, GPIO_NUM_18},
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{{&machine_pin_type}, GPIO_NUM_19},
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{{NULL}, -1},
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{{&machine_pin_type}, GPIO_NUM_21},
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{{&machine_pin_type}, GPIO_NUM_22},
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{{&machine_pin_type}, GPIO_NUM_23},
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{{NULL}, -1},
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{{&machine_pin_type}, GPIO_NUM_25},
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{{&machine_pin_type}, GPIO_NUM_26},
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{{&machine_pin_type}, GPIO_NUM_27},
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{{NULL}, -1},
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{{NULL}, -1},
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{{NULL}, -1},
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{{NULL}, -1},
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{{&machine_pin_type}, GPIO_NUM_32},
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{{&machine_pin_type}, GPIO_NUM_33},
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{{&machine_pin_type}, GPIO_NUM_34},
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{{&machine_pin_type}, GPIO_NUM_35},
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{{&machine_pin_type}, GPIO_NUM_36},
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{{&machine_pin_type}, GPIO_NUM_37},
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{{&machine_pin_type}, GPIO_NUM_38},
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{{&machine_pin_type}, GPIO_NUM_39},
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};
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// forward declaration
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STATIC const machine_pin_irq_obj_t machine_pin_irq_object[];
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void machine_pins_init(void) {
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static bool did_install = false;
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if (!did_install) {
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gpio_install_isr_service(0);
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did_install = true;
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}
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memset(&MP_STATE_PORT(machine_pin_irq_handler[0]), 0, sizeof(MP_STATE_PORT(machine_pin_irq_handler)));
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}
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void machine_pins_deinit(void) {
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for (int i = 0; i < MP_ARRAY_SIZE(machine_pin_obj); ++i) {
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if (machine_pin_obj[i].id != (gpio_num_t)-1) {
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gpio_isr_handler_remove(machine_pin_obj[i].id);
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}
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}
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}
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STATIC void IRAM_ATTR machine_pin_isr_handler(void *arg) {
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machine_pin_obj_t *self = arg;
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mp_obj_t handler = MP_STATE_PORT(machine_pin_irq_handler)[self->id];
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mp_sched_schedule(handler, MP_OBJ_FROM_PTR(self));
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}
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gpio_num_t machine_pin_get_id(mp_obj_t pin_in) {
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if (mp_obj_get_type(pin_in) != &machine_pin_type) {
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mp_raise_ValueError("expecting a pin");
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}
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machine_pin_obj_t *self = pin_in;
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return self->id;
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}
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STATIC void machine_pin_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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machine_pin_obj_t *self = self_in;
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mp_printf(print, "Pin(%u)", self->id);
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}
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// pin.init(mode, pull=None, *, value)
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STATIC mp_obj_t machine_pin_obj_init_helper(const machine_pin_obj_t *self, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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enum { ARG_mode, ARG_pull, ARG_value };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_mode, MP_ARG_OBJ, {.u_obj = mp_const_none}},
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{ MP_QSTR_pull, MP_ARG_OBJ, {.u_obj = mp_const_none}},
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{ MP_QSTR_value, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL}},
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};
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// parse args
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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// configure the pin for gpio
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gpio_pad_select_gpio(self->id);
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// set initial value (do this before configuring mode/pull)
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if (args[ARG_value].u_obj != MP_OBJ_NULL) {
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gpio_set_level(self->id, mp_obj_is_true(args[ARG_value].u_obj));
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}
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// configure mode
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if (args[ARG_mode].u_obj != mp_const_none) {
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mp_int_t pin_io_mode = mp_obj_get_int(args[ARG_mode].u_obj);
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if (self->id >= 34 && (pin_io_mode & GPIO_MODE_DEF_OUTPUT)) {
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mp_raise_ValueError("pin can only be input");
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} else {
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gpio_set_direction(self->id, pin_io_mode);
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}
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}
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// configure pull
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if (args[ARG_pull].u_obj != mp_const_none) {
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gpio_set_pull_mode(self->id, mp_obj_get_int(args[ARG_pull].u_obj));
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}
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return mp_const_none;
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}
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// constructor(id, ...)
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mp_obj_t mp_pin_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true);
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// get the wanted pin object
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int wanted_pin = mp_obj_get_int(args[0]);
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const machine_pin_obj_t *self = NULL;
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if (0 <= wanted_pin && wanted_pin < MP_ARRAY_SIZE(machine_pin_obj)) {
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self = (machine_pin_obj_t*)&machine_pin_obj[wanted_pin];
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}
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if (self == NULL || self->base.type == NULL) {
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mp_raise_ValueError("invalid pin");
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}
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if (n_args > 1 || n_kw > 0) {
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// pin mode given, so configure this GPIO
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mp_map_t kw_args;
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mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
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machine_pin_obj_init_helper(self, n_args - 1, args + 1, &kw_args);
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}
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return MP_OBJ_FROM_PTR(self);
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}
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// fast method for getting/setting pin value
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STATIC mp_obj_t machine_pin_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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mp_arg_check_num(n_args, n_kw, 0, 1, false);
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machine_pin_obj_t *self = self_in;
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if (n_args == 0) {
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// get pin
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return MP_OBJ_NEW_SMALL_INT(gpio_get_level(self->id));
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} else {
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// set pin
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gpio_set_level(self->id, mp_obj_is_true(args[0]));
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return mp_const_none;
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}
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}
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// pin.init(mode, pull)
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STATIC mp_obj_t machine_pin_obj_init(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
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return machine_pin_obj_init_helper(args[0], n_args - 1, args + 1, kw_args);
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}
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MP_DEFINE_CONST_FUN_OBJ_KW(machine_pin_init_obj, 1, machine_pin_obj_init);
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// pin.value([value])
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STATIC mp_obj_t machine_pin_value(size_t n_args, const mp_obj_t *args) {
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return machine_pin_call(args[0], n_args - 1, 0, args + 1);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_pin_value_obj, 1, 2, machine_pin_value);
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// pin.irq(handler=None, trigger=IRQ_FALLING|IRQ_RISING)
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STATIC mp_obj_t machine_pin_irq(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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enum { ARG_handler, ARG_trigger, ARG_hard };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_handler, MP_ARG_OBJ, {.u_obj = mp_const_none} },
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{ MP_QSTR_trigger, MP_ARG_INT, {.u_int = GPIO_PIN_INTR_POSEDGE | GPIO_PIN_INTR_NEGEDGE} },
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};
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machine_pin_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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if (n_args > 1 || kw_args->used != 0) {
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// configure irq
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mp_obj_t handler = args[ARG_handler].u_obj;
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uint32_t trigger = args[ARG_trigger].u_int;
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if (handler == mp_const_none) {
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handler = MP_OBJ_NULL;
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trigger = 0;
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}
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gpio_isr_handler_remove(self->id);
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MP_STATE_PORT(machine_pin_irq_handler)[self->id] = handler;
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gpio_set_intr_type(self->id, trigger);
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gpio_isr_handler_add(self->id, machine_pin_isr_handler, (void*)self);
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}
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// return the irq object
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return MP_OBJ_FROM_PTR(&machine_pin_irq_object[self->id]);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_KW(machine_pin_irq_obj, 1, machine_pin_irq);
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STATIC const mp_rom_map_elem_t machine_pin_locals_dict_table[] = {
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// instance methods
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{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&machine_pin_init_obj) },
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{ MP_ROM_QSTR(MP_QSTR_value), MP_ROM_PTR(&machine_pin_value_obj) },
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{ MP_ROM_QSTR(MP_QSTR_irq), MP_ROM_PTR(&machine_pin_irq_obj) },
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// class constants
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{ MP_ROM_QSTR(MP_QSTR_IN), MP_ROM_INT(GPIO_MODE_INPUT) },
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{ MP_ROM_QSTR(MP_QSTR_OUT), MP_ROM_INT(GPIO_MODE_INPUT_OUTPUT) },
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{ MP_ROM_QSTR(MP_QSTR_OPEN_DRAIN), MP_ROM_INT(GPIO_MODE_INPUT_OUTPUT_OD) },
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{ MP_ROM_QSTR(MP_QSTR_PULL_UP), MP_ROM_INT(GPIO_PULLUP_ONLY) },
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{ MP_ROM_QSTR(MP_QSTR_PULL_DOWN), MP_ROM_INT(GPIO_PULLDOWN_ONLY) },
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{ MP_ROM_QSTR(MP_QSTR_IRQ_RISING), MP_ROM_INT(GPIO_PIN_INTR_POSEDGE) },
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{ MP_ROM_QSTR(MP_QSTR_IRQ_FALLING), MP_ROM_INT(GPIO_PIN_INTR_NEGEDGE) },
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};
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STATIC mp_uint_t pin_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_t arg, int *errcode) {
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(void)errcode;
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machine_pin_obj_t *self = self_in;
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switch (request) {
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case MP_PIN_READ: {
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return gpio_get_level(self->id);
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}
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case MP_PIN_WRITE: {
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gpio_set_level(self->id, arg);
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return 0;
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}
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}
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return -1;
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}
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STATIC MP_DEFINE_CONST_DICT(machine_pin_locals_dict, machine_pin_locals_dict_table);
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STATIC const mp_pin_p_t pin_pin_p = {
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.ioctl = pin_ioctl,
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};
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const mp_obj_type_t machine_pin_type = {
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{ &mp_type_type },
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.name = MP_QSTR_Pin,
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.print = machine_pin_print,
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.make_new = mp_pin_make_new,
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.call = machine_pin_call,
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.protocol = &pin_pin_p,
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.locals_dict = (mp_obj_t)&machine_pin_locals_dict,
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};
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/******************************************************************************/
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// Pin IRQ object
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STATIC const mp_obj_type_t machine_pin_irq_type;
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STATIC const machine_pin_irq_obj_t machine_pin_irq_object[] = {
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{{&machine_pin_irq_type}, GPIO_NUM_0},
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{{&machine_pin_irq_type}, GPIO_NUM_1},
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{{&machine_pin_irq_type}, GPIO_NUM_2},
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{{&machine_pin_irq_type}, GPIO_NUM_3},
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{{&machine_pin_irq_type}, GPIO_NUM_4},
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{{&machine_pin_irq_type}, GPIO_NUM_5},
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{{&machine_pin_irq_type}, GPIO_NUM_6},
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{{&machine_pin_irq_type}, GPIO_NUM_7},
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{{&machine_pin_irq_type}, GPIO_NUM_8},
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{{&machine_pin_irq_type}, GPIO_NUM_9},
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{{&machine_pin_irq_type}, GPIO_NUM_10},
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{{&machine_pin_irq_type}, GPIO_NUM_11},
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{{&machine_pin_irq_type}, GPIO_NUM_12},
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{{&machine_pin_irq_type}, GPIO_NUM_13},
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{{&machine_pin_irq_type}, GPIO_NUM_14},
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{{&machine_pin_irq_type}, GPIO_NUM_15},
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{{&machine_pin_irq_type}, GPIO_NUM_16},
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{{&machine_pin_irq_type}, GPIO_NUM_17},
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{{&machine_pin_irq_type}, GPIO_NUM_18},
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{{&machine_pin_irq_type}, GPIO_NUM_19},
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{{NULL}, -1},
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{{&machine_pin_irq_type}, GPIO_NUM_21},
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{{&machine_pin_irq_type}, GPIO_NUM_22},
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{{&machine_pin_irq_type}, GPIO_NUM_23},
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{{NULL}, -1},
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{{&machine_pin_irq_type}, GPIO_NUM_25},
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{{&machine_pin_irq_type}, GPIO_NUM_26},
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{{&machine_pin_irq_type}, GPIO_NUM_27},
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{{NULL}, -1},
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{{NULL}, -1},
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{{NULL}, -1},
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{{NULL}, -1},
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{{&machine_pin_irq_type}, GPIO_NUM_32},
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{{&machine_pin_irq_type}, GPIO_NUM_33},
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{{&machine_pin_irq_type}, GPIO_NUM_34},
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{{&machine_pin_irq_type}, GPIO_NUM_35},
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{{&machine_pin_irq_type}, GPIO_NUM_36},
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{{&machine_pin_irq_type}, GPIO_NUM_37},
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{{&machine_pin_irq_type}, GPIO_NUM_38},
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{{&machine_pin_irq_type}, GPIO_NUM_39},
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};
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STATIC mp_obj_t machine_pin_irq_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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machine_pin_irq_obj_t *self = self_in;
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mp_arg_check_num(n_args, n_kw, 0, 0, false);
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machine_pin_isr_handler((void*)&machine_pin_obj[self->id]);
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return mp_const_none;
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}
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STATIC mp_obj_t machine_pin_irq_trigger(size_t n_args, const mp_obj_t *args) {
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machine_pin_irq_obj_t *self = args[0];
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uint32_t orig_trig = GPIO.pin[self->id].int_type;
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if (n_args == 2) {
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// set trigger
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gpio_set_intr_type(self->id, mp_obj_get_int(args[1]));
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}
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// return original trigger value
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return MP_OBJ_NEW_SMALL_INT(orig_trig);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_pin_irq_trigger_obj, 1, 2, machine_pin_irq_trigger);
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STATIC const mp_rom_map_elem_t machine_pin_irq_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_trigger), MP_ROM_PTR(&machine_pin_irq_trigger_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(machine_pin_irq_locals_dict, machine_pin_irq_locals_dict_table);
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STATIC const mp_obj_type_t machine_pin_irq_type = {
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{ &mp_type_type },
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.name = MP_QSTR_IRQ,
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.call = machine_pin_irq_call,
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.locals_dict = (mp_obj_dict_t*)&machine_pin_irq_locals_dict,
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};
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